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Interlaced video (also known as interlaced scan) is a technique for doubling the perceived frame rate of a video display without consuming extra bandwidth. The interlaced signal contains two fields of a video frame captured consecutively.
Deinterlacing is the process of converting interlaced video into a non-interlaced or progressive form. Interlaced video signals are commonly found in analog television, VHS, Laserdisc, digital television when in the 1080i format, some DVD titles, and a smaller number of Blu-ray discs.
A line doubler is a device or algorithm used to deinterlace video signals prior to display on a progressive scan display. The main function of a deinterlacer is to take an interlaced video frame which consists of 60 two-field interlaced fields of an NTSC analogue video signal or 50 fields of a PAL signal, and create a progressive scan output ...
In video engineering, field dominance refers to the choice of which field of an interlaced video signal is chosen as the point at which video edits or switches occur. There are two main choices for field dominance: odd or even. With odd field dominance the edit or switch occurs at the start of the odd field.
1080i is a term used in high-definition television (HDTV) and video display technology. It means a video mode with 1080 lines of vertical resolution. The "i" stands for interlaced scanning method. This format was once a standard in HDTV. It was particularly used for broadcast television.
Progressive segmented Frame (PsF, sF, SF) is a scheme designed to acquire, store, modify, and distribute progressive scan video using interlaced equipment.. With PsF, a progressive frame is divided into two segments, with the odd lines in one segment and the even lines in the other segment.
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Even though the MC6845 video controller can provide the timing for interlaced video, the CGA's circuitry aligns the synchronization signals in such a way that scanning is always progressive. Consequently, it is impossible to double the vertical resolution to 400 scanlines using a standard 15 kHz monitor.